[time_series_with_matrices] Update editorial suggestions (#464)

* [time_series_with_matrices] Update editorial suggestions * Fix inconsistencies in the symbols and variable names * add intersphinx mapping and link example * fix intersphinx mapping address * Update lectures/time_series_with_matrices.md Co-authored-by: Matt McKay <mmcky@users.noreply.github.com> * Update lectures/time_series_with_matrices.md Co-authored-by: Matt McKay <mmcky@users.noreply.github.com> * Update time_series_with_matrices.md * Update lectures/time_series_with_matrices.md Co-authored-by: Matt McKay <mmcky@users.noreply.github.com> --------- Co-authored-by: Humphrey Yang <u6474961@anu.edu.au> Co-authored-by: mmcky <mamckay@gmail.com> Co-authored-by: Matt McKay <mmcky@users.noreply.github.com>

Author: 3 people

lectures/_config.yml

@@ -75,6 +75,9 @@ sphinx:
  colab_url : https://colab.research.google.com
  thebe : false # Add a thebe button to pages (requires the repository to run on Binder)
  intersphinx_mapping:
+ intermediate: 
+ - https://python.quantecon.org/
+ - null
  pyprog:
  - https://python-programming.quantecon.org/
  - null

lectures/lln_clt.md

@@ -167,6 +167,7 @@ $$
 
 The next theorem is called Kolmogorov's strong law of large numbers.
 
+(iid-theorem)=
 ````{prf:theorem}
 If $X_1, \ldots, X_n$ are IID and $\mathbb E |X|$ is finite, then